diff --git a/library/ctr_drbg.c b/library/ctr_drbg.c
index 8a62f6d..8c6ee59 100644
--- a/library/ctr_drbg.c
+++ b/library/ctr_drbg.c
@@ -732,6 +732,7 @@
 
     test_offset = 0;
     mbedtls_ctr_drbg_set_entropy_len( &ctx, 32 );
+    mbedtls_ctr_drbg_set_nonce_len( &ctx, 0 );
     CHK( mbedtls_ctr_drbg_seed( &ctx,
                                 ctr_drbg_self_test_entropy,
                                 (void *) entropy_source_pr,
@@ -756,6 +757,7 @@
 
     test_offset = 0;
     mbedtls_ctr_drbg_set_entropy_len( &ctx, 32 );
+    mbedtls_ctr_drbg_set_nonce_len( &ctx, 0 );
     CHK( mbedtls_ctr_drbg_seed( &ctx,
                                 ctr_drbg_self_test_entropy,
                                 (void *) entropy_source_nopr,